<div class="inline" ng-init="init(province,city,district)">
    <select class="form-control oneIn3 inline" ng-model="province" ng-options="item.p as item.p for item in provinces" ng-change="changecity(province)">
        <option value="">- 省/直辖市 -</option>
    </select>
    <select class="form-control oneIn3 inline" ng-model="city" ng-show="cities.length>0" ng-options="item.n as item.n for item in cities" ng-change="changedistrict(city)">
        <option value="">- - - 市 - - -</option>
    </select>
    <select class="form-control oneIn3 inline" ng-model="district" ng-show="districts.length>0" ng-options="item.s as item.s for item in districts" >
        <option value="">- - -县/区- - -</option>
    </select>
</div>